Protector mechanism for looms



July 1,1930. 4 K. J. UNWINv 1,769,402

PROTECTOR MCHANISM FOR LOOMS Filed April l0I 1928 17H/mw Y [n/762%:fm1/wb Patented v,July 1v, `193() *,"IUNITE D .s

Kniviviaxink .'r.. UNWIN, orWORCESTER.'MASSACHUSETTS, Assieitoii.'rooiaoiviriona xivoWLnsf Looiviwoitns, or WonciiSrna, nASsAcHUSnTmsf-ACORPORATION oF- .n

MASSACHUSETTS H y Application .filed hpi'il 1'0,

This invention relates to improvements in v protectormechanism vforlooms and itis the general object of the invention tov provide a simpledevice which will hold lthe Adetector finger resiliently against theshuttle binder when the shuttle is boxed and operate to re'- move thebinderlinger pressure when the shuttle is beingv picked.- f Y In theusual loom employing aifiy shuttlev the picking mechanism l operatesto-.propel the shuttle when the lay has reached approXr mately its midposition on its backward stroke. K.

As ordinarily constructed the protector mechanismhas a binderIingerwhich is held'under spring tension against the shuttle binder atall times. It is animportant object of `my resent invention to provide aSpring which Y will hold the finger against the binder during berequiredto move the shuttle.

lals

a portion of the cycle of the pick ofI theloom but eective to remove thespring pressureat the time ofV pickingso lthat less power will A shuttlewill usually enter itsshuttle boX when the lay is approximately at itsmid point when moving/forwardly .and itis therefore necessary at' this itime 4to have vthe protector.

moves to disable the spring during the'baclzward movement ofthe lay,butto permitthe same to be operative with respect tol the protectorfinger on theforward movement of .thelay so that protection'may takeplace in the usual manner.

It is ,a more particular'object `of* my present invention 'to provideaspringplunger surrounded by'acompresson spring, the Vplunger to operateprior :to boxing of the shuttle Yto exert pressure against thebinder'bythefprotector finger, and Said plungerbeing removed by the Connectionwith the crank to ylessen or ventirely remove pressure againstthe bindery PROTECTOR-ivinciinnisivrnoitiiooivis- 1923.4 Serial no. 268,941. .j

dll@ 0 the PiOtector ingeriwhenthe layV is( picking position.l f

f i ,With these and other objects view will,` appear as the descriptionproceeds, myr invention resides in the combination and arrangement ofparts hereinaften described Vand set forth in'the'claims. f. V n In ytheaccompanying drawings, Awherein I' have shown a convenient embodiment ofmy invention, p y A, Y F ig. 1 is a front elevation of a portion of alay having myinvention applied thereto,

F ig. 2 is a vertical section on line 2-2 of Eig. '3 is a view similarto Fig. Q'vviththe breast beam and loom parts omitted and with vl" ig. 1showing arportion ofthe breast beam y in section and showing the lay inthe position it assumesy when moving forwardly, and r the lay and 1associated parts kmoving rear-V wardly or'towardpicliing position.

'Referring to thedrawingshave shown a loom frame lOhaving a breastbeamfll von whichmay be mounted'knock-o' mechanism 12. Said mechanismmay cooperate with a daggerl carried on aprotector rodlt which Visoscillatable in a bracket 15 secured toi the i2-Lyle. ,Theiay may@@SuniwftedbySword-5k Y i i one of which is indicated at 17, and mayhavea pair of shuttle boXes 18 which rise andfall lso that first one` andthenthe other of the shuttles S is moved into active vposition withrespect to the race plate 19 on the lay. Each y shuttle b oX is providedwith a binder Q0 which f is movedoutwardly or toward the breast beambythe-shuttles when they ,are boxed. The binder corresponding to theactive shuttley is adapted for cooperation with a protector finger21`which is securedr to tlie,pr0. tectorrod 14 in'fixed angularrelationwith of which there are two, have connection as at Y such as thetop kor crank shaft of the loom'not shown to move the lay backwardly andfor'- wardly awayffrom and toward thebreast beam 11. y. l .y

Innormal operationthe shuttle which is shown when the lay is movingbackwardly with the'lay and are driven. by any means;-

respect to they dagger 13; Connector rods 22, 9.0 i I and in theposition shown in Fig. 2, andV Aeffect of which is to depress the'dagger 13 so that the same will inovevforwardly without engagement of.the knock-Ev mechanism 12. Should the shuttle fail to be boxed,however, the binder corresponding to the active shuttle box will not bemoved forwardly and the fin- V ger and dagger will assume the positionshown in dotted linesA in Fig.2, the dagger engaging'the knock-oft1device 12 to effect immediate stoppage of the loom to prevent breakageof the-warp threads; The mechamsmV thus for described 1s of commonconstruction and forms no part of myfpres'ent invention.`

In carrying my improvements into eect -I provide means whereby thebinder finger 21 will'be moved yieldingly toward the shutf tle bindercorresponding to the active shuttle during the forwardymovernent of-thelay and I provide further forv moving the protector finger away from thebinder during the backward stroke of the lay. This result I achieve byproviding a depending arm having a hub31 which is held infixed butadjustable angular position on the protector rod 14 by a'set screw 32.Pivotally connected to said. arm at the lower end thereof 'as at 33 isarearwardly extending spring rod or plunger 34 having 'on the forward endthere- Aof a collar 35 which is adjustable'alongthe rod and is retainedin adjusted position by setscrew 36.

Surrounding the rear portion vof the rod.

behind the collar 35 is a compression spring 37, the rear end of whichengages a clip 38 secured to the underside of the connector rod 22 by`means of bolts 39. The plunger 34 eX- f tends through 'an-'opening 40 inthe clip and has the rear end thereof threaded as at 41 to receive apair of nuts 42 adjustable along the rod and acting to engage the rearsurface of the clip 38 to limit forward movement of the plunger 34 underaction of the spring 37.

In operation, it will be understood that the connector 22 will assumetwo angulaipositions with respect to the lay when the latter issubstantially midway betweenits extreme forward and backwardpositions-and that said connector will be inclined downwardly andrearwardly as indicated in Fig'. '2 when the lay is moved forwardly assuggested vby arrow A, Fig. 2, and that said connector will be inclinedupwardly and rearwardly when the lay is moving rearwardly as suggestedby arrow B in Fig. 3. The .connector rod will ordinarily move 1n avertical plane which is perpendicular to the lay. ihe depending portionof the clip 38 will therefore bein two'different angular positions whenthe lay is in its mid position, depending upon the direction of movementof the lay.' When the lay is advancing the clip will be in therelatively forward 1position to compress spring'37Y and through, the'llatter urgelthe protector finger 21 against the shuttle bindercorresponding to the active shuttle. `The linger is therefore held atthis timein position to beV controlled by ftherbinder' so that: thedagger may receive its normal movementaway from the knock-off device 12if theshuttle is properly'boXed. Y Y,

On thebackwardstroke of the lay, however, the clip 38 will be movingrelatively rearwardly as indicated in 3 and will engage the nuts 42Y soas to move the arm 3() rearwardly and Vthereby rock the protector rod 14in a clockwise direction as viewed in Fig. 3 tornove the protectorfinger 21 out of engagement with the binder corresponding to the activeshuttle. Y The latterV may therefore be picked with less power thanwould be the Y Y case if the ypressure of spring' 37were permitted tobearvagainst the shuttle.- By varying theY position of the nuts 42 alongthe rear end of theplunger or rod 34 the time and also the degree ofmovement of the protector'V linger21 may bechanged,V l

From the foregoing it will beseen that I have provideda verysiinplemeans forv per- Ymitting aspring to exertv its pressure against aprotector linger during theboXing of lthe shuttle to permit the usualprotecting voperation, and that :said binder finger is moved to pressurerelieving position yat the time of picking. It will also be seen;thattheparts operate with the use of a single spring which at times isineffective to exertpressure onthe binder finger and at other times iscompressed .by the clip 38 to exert pressure against the binder. -By thearrangement set forth herein I find it'unnecessaryftoV employ thedilficultly replaceable usual torsion spring 4custornaril placed aroundVthe protector rod 14. Y

lHaving thus'described my invention it will be apparent that changesandmodifications may be made therein by those vskilled in the art withoutdeparting from theA spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is: n V

1. In protector mechanism for a loom having a lay to move backwardly andforwardly and a shuttle normallyto be boxed when the l lay is moving `inone .direction andV to be picked when the lay is moving in the. otherdirection, a lay driving crank connector mov-y able'relativelyto the layin a plane substantially perpendicularto the lay, said connector movingin one direction relatively to the lay immediately prior-to boxingofythe'shuttle and movable in another direction relatively to the layimmediately prior to picking, aprotector finger capable ofresisting-movement of the shuttle, a depending arm fixedr with respectto the protector finger and movable with-the latter, a rod pivotallyconnected to said depending arm and extending rearwardly, a springsurrounding said rod, and supporting meansfor` the rear yend of the rodthrough which the latter extends, said supporting means being carried bythecrank connector and effective when theshuttle is being boxed tocompress the spring and effective when the shuttle is being picked tomove the rod vto move the finger to vshuttlerrelievi'ng 'iii position. Y

2. In protector mechanismfor a loom having aV lay to move backwardlyland forwardly and a shuttle normally to be boxed when the lay is movingin one direction and to be picked when the lay is moving in the other xdirection, a lay driving crank connector movable relatively to the layin a plane substan-A tially perpendicular to lthe lay, said connectormoving in one direction relatively to the lay immediately prior toboxing ofthe shuttle and movable in another direction relatively to thelayimmediately prior to picking, a protector finger capable of resistingmovement of the shuttle, a rod operatively connected to the finger andmovable with the latter, a spring surrounding the rod, and 5;springengaglng means carried bythe crank connector, said meanseffectivelwhen the shuttle is being boxed to engage the spring and throughthelatter transmit yielding pressure to the finger to resist movement ofthe shuttle, and said means movable when the Y shuttle vis being pickedto engage the rod 'to relievethe pressure of the spring and there` bydiminish the resistance offered by the protector nger to the movement ofthe shuttle.

3. In protector mechanism for a loom having a lay to move backwardlyandforwardly and a shuttle normally to be boxed when theV lay is moving inone direction and to be picked when the lay is moving in the othery 1direction, a lay driving crank connector `movable relatively'to the lay-in a plane substantially perpendicular to the lay, said connecing, aprotector finger capable of resisting n tor moving in one directionrelatively to the lay immediately prior to boxing of the shuttle andmovable in another direction relatively to the lay immediately prior topickmovement ofthe shuttle, a depending arm movable in fixed angularrelation with respect to the protector'finger, a rearwardly extendingrod pivotally connected to said arm, va spring surroundingsaid rod,supporting means for the rear-end of the rod carried by moving theprotector'inger to a position to t relieve resistance to the motion ofthe shuttle when the latter'is being picked,` i y 4:. In protectormechanism for a loom having a lay to move backwardly and forwardly vanda shuttle normallyy to be boxed 'when the lay is moving inonedirection and to be picked when the lay is moving in the otherdirection,

la lay driving crank connector movable Vrelai tively to the'lay in aplane substantially perpendicular to the lay, said connector moving ,l

in one direction relatively to the lay immediately prior to boxing oftheshuttle and movable in another direction relatively tothe layimmediately prior to picking, a protector finger capable Vof resistingmovement of the shuttle, a dependingarm movable in fixed any gularrelation with the detector finger, a rearwardly extending rod pivotallyconnected-to the latter, said supporting Ameans' compressing thespringto increase the resistance which Y the protector finger offers tothe movement of the shuttle when the latter is being boxed, and saidsupporting means engaging the member therebehind on the rod to move saiddetector shuttle is being picked. f

rnger to shuttle relieving position whenthe fixed my signature. cVKENNETH UNWIN.

In testimony whereof 'I have hereunto af- Y c the crank connector andmovable with the latter, said supporting means lengaging the spring tocompress the latter to cause the same to exert yielding pressureragainst the binder finger when the shuttle is beingvboxed,

and said supporting means positively engaging and withdrawing the rodand thereby

